New Delhi, April 6 (IANS) Veteran actress and social activist Shabana Azmi was spotted travelling in the Metro here.Shabana on Thursday took to Twitter where she shared a photograph of herself along with a fan in the Airport Express Metro to save time. "Travelling by Delhi Metro from airport to make it in time for an urgent appointment! It's superb... Clean," Shabana tweeted. On the acting front, Shabana will be seen in critically acclaimed filmmaker Aparna Sen's latest directorial venture "Sonata". It is adapted from the eponymous play by award-winning playwright Mahesh Elkunchwar, and is slated to hit the screens on April 21."Sonata" is the psychological exploration of three unmarried women facing a mid-life crisis.The English drama revolves around three friends -- Aruna Chaturvedi, a professor essayed by Aparna Sen, Dolon Sen, a banker portrayed by Shabana and Subhadra Parekh, a journalist played by Lillete Dubey.